Mechanical movement.



W. STEVENS.

MECHANICAL MOVEMENT. APPLICATION FILED FEB. 3, 1914.

Patented Apr. 4,1916.

QOOOOOQO 05622 65,5" 65, [22 van (fo Zflz'ZZz'am ,3 evensa UNITED srnrns rn rn' .WILLIAM STEVENS, 0]? LOS ANGELES, CALIFORNIA, ASSIG'NOR OF ONE-HALE TO SAMUEL M. BARNES, OF SANTA ANA, CALIFORNIA.

MECHANICAL MOVEMENT.

Specification of Letters Patent. Patented 4, v

Application filed February 3, 1914. Serial No. 816,230.

To all whom it may concern:

Be it known that I, WILLIAM Srnvnns, a

citizen of the United States, residing at Los.

Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Mechanical M vements, of which the following is a specification. I

This

vide a new mechanical movement whereby intermittent motion. in either direction, with relatively long dwells or periods of rest between relatively brief periods of movement, may be obtained. A mechanical movement of, this nature is highly desirable for cameras and apparatus for taking and projecting pictures of moving objects, the film or strip of image-receiving andimageplojecti-ng material being caused to move so as to produce a minimum of blur in both taking and projecting the pictures.-

The invention has for its object to provide a new mechanical movement of the general characteristics above stated, which will be superior in point of relative simplicity and inexpensiveness of construction and organization, taken in connection with positiveness of operation, freedom from liability togetf out of repair, length of life. and compactness in form. and which will be generally superior in efliciency and serviceability and of the same, taken upon the lines ar -m Fi 1. and looking in the direction of the appended arrow: Fig. 3 is a view similar to i- :1 of a modified constructi n; and liig.

invention relates to mechanical movements, and it has for its ob ect to pro- 4 is'a View similar to Fig. 2 taken upon the line 00 a2 Fig.- 3, and looking in the direction of the appended arrow.

Corresponding parts in Figs. 1 and'2, and corresponding parts in Figs. 3 and 4 are designated by the same reference characters.

Referring with particularity to the drawing, and to Figs. 1 and 2 thereof, the form of mechanical movement therein shown'comprises a driving member A and a driven member B, which are respectively provided with shafts 5 and 6. the axes of which are out of alinement. Themembers are shown as mounted upon a plate or support 7. The member Acomprises an annular cup-shaped body 8 having a peripheral rim flange 9 rotatably received within a guide or guides 10 uponthc support 7. The shaft 5 springscentrally from the annular body 8, being directed away from the support 7. The body 8 is'provided at one side with a pin 11 and with a notch or recess 12 in registration therewith, both .ofwhich co'iperate with the driven member B as hereinafter described The body is provided with an annular flange 13 within which the pin 11 and notch 12 aredisposed and which abuts against the plate 7. The driven member B comprises a two-part irregular body 14, fixed to the shaft 6 which projects centrally therefrom through a suitable bearing in the plate 7..

One part 145*, of the body 14, namely that part presented toward the cup-shaped body 8 or central portion""8 thereof, has a' plurality of curved faces 14*, of equal length, shown as four in number, the arcsof such faces being mutually interrupting and plotted with the same radius and from a flat faced disk, which is presented to theplate 7. These projections are slightly recessed each, at each side, as at li to closely coiperate with and fit the rounded pin 11. The faces 14 sweep the interior periphery of the annulus 8, The shaft 6 springs cenuricu.

. actuate the same.

.relatively long periods of idleness.

trally from the body 14, and beyond the plate 7 may be provided with teeth or sprockets or the like 15 for engagement with a moving picture film or the like 16, to In the operation of this form of the mechanical movement, rotation of the shaft 5 brings the pin 11 into engagement with one of the projections 14", in one of the recesses 14, initiating rotation of the body 14, which rotation is continued by immediate subsequent engagement of one wall of the recess 12 with one of the noses or corners of the body portion 14 This engagement completes a pre-determined movement of the member .13, amounting to a quarter turn of the shaft 6. The shaft 6 is stationary during approximatelytwelvethirtecnths of a complete rotation of the shaft 5, and moves quickly through sub-' stantially one-thirteenth'of such rotation, to the extent of a quarter turn. Thus the intermittent actuation of the shaft 6, while being quick and sharp, alternates with The actuated device, or object such as the film 16, is thus very quickly moved or advanced from station to station, or position to position, in accompaniment with intermittent or alternating stages of complete rest. Thus, in moving picture practice, a clear distinct series of images is projected upon the screen, the blur incident to shifting of the fi m portion being largely eliminated.

Referring to the form of construction shown in Figs. 3 and 4, C designates the driving part and D designates the driven part. The drive member comprises an an nular cup-shaped body 17 from the center portion of the face 17 of which springs a drive shaft 18. The body 17 abuts against a plate or base 19, through a rim flange 20, and is held to the plate 19 by a guide or guides 21 which embrace a packing ring 22. One side of the body 17 carries a pin 23 which is in registration with a notch or recess 24 which pin and nose cooperate with the driven member D asabout to be described. A bracket 25 is disposed within the cup-shaped body 17, having a bearing 26 which receivesa stub shaft 27 in alinement with the shaft 18 and within the body 17; and an adjusting screw 28 passed through the'plate or base 19 cooperates with said bracket to permit tightening up or loosening the drive member C. The screw 28 has a pointed end which eccentrically engages a recess in the bracket 25 so that by tightening the screw the annular member will be brought into a tighter fractional engagement with its bearings and any objectional looseness taken up. The bracket 25 is supported by screws 25 passing through elongated apertures 25" in the bracket 25 and .into the base or plate 19, and such screws 25 are loosened when making adjustment of the bracket by turning the screw 28 to force the bearing surfaces into proper working ad ustment, the screws 25 belng again tightened after such adjustment has been made, thereby clamping thebracket between the heads of the screws 25 and the base- The driven member D coma or plate 19. prises a shaft 29 journaled in the base 19 and carrying within the'cup-shaped body 17 a two-part body 30, one part.30fof which has a flat outer face and a periphery consisting of three mutually interrupting arcs of equal length and produced to the same radius from equi-distant centers.

The other body portion, 30 comprises a central portion having a flat face in engagement with the plate 19 and having a plurality of radial projections 50 whichare relatively equi-distant and each of which at each side is slightly recessed as at 30 The shaft 29 is out of alinement with the shaft 18. The body part 30 sweeps the interior periphery of the annulus 17. In operation,

rotation of the shaft 18 causes rotation of the body 17, and rotation of the body 30,

which is initiated by the pin 23 engaging one of the radial pro ect1ons 30 1n one of the recesses 30 whereupon almost immediately the notch 24 engages with one of the noses between merging V peripherial curved portions 30 the total actuation of the body 30 thus causing a third of a turn of the; V

shaft 29. The driven member D is idle through nine-tenths of a complete rotation of the drive member C, and moves to complete a one-third rotation during one-tenth of such rotation of the drive member C.

Pins or sprockets or the like'31 may be applied to the driven shaft29. for engagement with the motion picture film 32 or other driven or actuated'device. In this form of construction a like quickness of actuation and a long dwell or period ofinaction after each actuation is provided,with all the ad vantages set forth in connection with the construction shown in Figs. 1 and 2.

In each form of construction the piu 11' D remains locked until'asubsequent actua tion commences.

In prior Letters Patent of the United- States issued to me June 20, 1899, Number. 1

627,241, I have shown a mechanical move-r is a-di'stinct and separate entity from the present disclosure.

It is manifest that many variations in form of construction, and in method of application and in combination of parts and features, and in character of service, may be made, with respect to the present disclosure, or within a fair spirit of interpretation of the invention.

, Having thus disclosed my invention, 1 claim and desire to secure by Letters Patent:

1. A mechanical movement including an annular rotatable member having a recess in one side of the interior periphery thereof and provided with a projection, and a second rotatable member arranged eccentrically within the annular member and comprising a two part body, one part of which is formed with intersecting arcuate edges arranged to be brought successively into engagement with the inner periphery of the annular member to lock the second member against rotation until the recess permits another arcuate edge to be brought into operative position, while the other part of the body is formed with radial projections adapted to be successively engaged by the before mentioned projectionof the annular member and arranged in cooperative relation to the arcuate edges.

2. A mechanical movement including an annular rotatable member provided with an interior peripheral wall and an annular clearance space, said peripheral wall having a recess at one side thereof, a projection extending into the clearance space and carried by the annular member, and a second rotatable member arranged eccentrically within the annular member and comprising a two part body, one part being formed with a plurality of intersecting arcuate edges arranged for successive engagement with the peripheral wall of the annular member to lock the second member against rotation, while the other part is formed with radial projections which project into the before mentioned clearance space of the annular member and are successively engaged by the before mentioned projection to rotate the second member and bring another arcuate edge thereof into operative position each time the recess is brought into position to permit such rotation of the second member.

3. A mechanical movement including an annular rotatable member provided with an interior peripheral wall and an annular clearance space, said peripheral wall having a recess in'one side thereof, a projection car ried by the annular member and extending into theclearance space, and a second rotatable member mounted eccentrically within the annular member and comprising a two part body, one part thereof having a plurality'of intersecting arcuateedges arranged for successive engagement with the peripheral wall of the annular member to lock the second member against rotation, while the other part is provided with a radial projection for each arcuate edge, said radial projections traveling in the before mentioned clearance space of the annular member and provided with seats for successive engagement with the before mentioned projection of the annular member to rotate the second member and bring another arcuate edge into operative position each time the recess in the annular member is brought into position to permit such rotation of the second member.

4. A mechanical movement including an annular rotatable member provided with an interior peripheral wall and an annular clearance space, said peripheral wall having a recess at one side thereof, a pin carried by the annular member and extending into the clearance space, and a second rotatable member mounted eccentrically within the annular member and comprising a two part body, one part thereof having a plurality of intersecting arcuate edges arranged for successive engagement with the peripheral wall of the annular member to lock the second member against rotation, while the other part is formed with a radial projection for each arcuate edge, said radial projections extending into the annular clearance space of the first member and being recessed at each side for successive engagement with the before mentioned pin when the first member is rotated in either direction to rotate the second member and bring another arcuate edge into operative position each time the recess of the first member is broughtinto position to per mit such rotation.

5. A mechanical movement including an annular rotatable member having a recess in one side of the interior periphery thereof and provided with a projection, a bearing for the annularrotatable member, adjusting means for taking up looseness within the bearing, and a second rotatable member mounted eccentrically within the annular member and comprising a two part body, one part thereof being formed with intersecting arcuate edges arranged to be brought successively into engagement with the inner periphery of the annular member to lock the second member against rotation, while the other part of the body is formed with radial projections adapted to be successively engaged by the before mentioned projection of name to this specification in the presence of the annular member to rotate the second two subscriblng Witnesses. member and bring another arcuate edge thereof into operative position each time the Witnesses:

recess of the annular member is brought into position to permit such rotation. ALFRED H. DAEHLER,

In testimony whereof, I have signed my W. F. COOK.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0.

WILLIAM STEVENS. 

